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Cable and line Testing Instrument

LQHV-500 Cable Fault Locator - Advanced Underground Power Cable Tester

The LQHV-500 cable fault locator detects all power cable faults with 1m accuracy. Portable, rechargeable & equipped with advanced pulse technology for underground cable testing.


  • US$1.00; Negotiated Price
  • Lead time: 30days

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Product Details

Product Tags

LQHV-500 Cable Fault Locator System

Professional Underground Cable Fault Detection

The LQHV-500 represents the next generation of portable cable fault testers, combining flashover detection, path tracing, and precise location capabilities in one integrated system. Engineered for field technicians, this unit delivers military-grade precision for power utility maintenance and industrial cable testing.

Product Parameters

Technical parameters

The longest testing distance15km (100km for the open-wire line)
Testing .dead zone1m
Resolution of reading1m
Power dissipation5VA
environment temperature0℃~+40℃
terminal temperature-10℃~+50℃
relative humility20-90%RH
Dimension275×220×160mm3
Weigh1.8kg

Pathfinders

operation modeOutput - fixed frequency intermittent square wave signal
Output PowerPomax≥100W
Output impedance1Ω-∞
Output signal frequency16kHz
Output signal amplitude15V-340V
Pathfinder transmitter power supplyAC220V±10℅

Fault locator

Rough measurement errorLess than 10%
Fixed-point error<±10cm
Electromagnetic channel gain>110dB (300,000 times)
Electromagnetic channel receiver sensitivity<5μV
Sound channel audio amplifier gain<120dB (1 million times when the signal-to-noise ratio is 4:1)
50Hz Power frequency rejection>40dB (100 times)
Power consumption<120mA (0.7W)
Buried depth detection>≦3m

Comprehensive Fault Detection Capabilities

Identifies all common cable faults including:

  • Low/high resistance faults

  • Short circuits & open circuits

  • Insulation leakage

  • Flashover faults

  • Sheath damage

Advanced Technology Features

Dual Detection Modes

Combines low-voltage pulse method and high-voltage flashover method for complete fault spectrum analysis

Intelligent Signal Processing

Quartz crystal oscillator with DSP chip ensures stable waveforms even in noisy environments

Adaptive Cable Matching

Automatically adjusts wave propagation speed based on cable type (XLPE/PVC/paper insulation)

Field-Proven Reliability

  • Military-grade imported components with <0.1% static drift

  • IP54 rated enclosure for harsh environments

  • Complete circuit protection (overvoltage/overcurrent/surge)

  • 3-year warranty on core components

Complete Test Kit Includes

  1. Main detection unit

  2. T-type electromagnetic probe

  3. A-frame ground fault locator

  4. Noise-canceling headphones

  5. Professional carrying case

Industry Applications

Ideal for:

  • Power utility maintenance teams

  • Industrial plant electrical departments

  • Telecommunication cable networks

  • Railway power systems

  • Oil & gas pipeline cathodic protection

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